Linking
HMS is required as the HelixNet Host. Link Group may include five additional HMS members, including up to three LQ devices for a maximum of six HMS/LQ in Link Group. HMS link using HLI-ET2 or HLI-FBS modules over LAN/WAN connections. Link Group supports up to 64 endpoints (station/port).
Note: HMS does not link to Arcadia.
Channels
System provides 12 or 24 intercom channels assignable to any user station or port in the system. Four Channels can be assigned to station. Program Audio can be associated with any channel with independent endpoint level control.
Roles
99 Roles for naming and dynamic configuration of user station settings. Role can be applied to multiple user stations.
Licenses
Host: HMS-4X
Activation: Generated to unique HMS-4X device System ID
Transferable: No, fixed to HMS-4X
Recovery: Yes, by Clear-Com Support or Service Center
Permanent Licenses
Part numbers: HMS-24-UG
Capability: 24 Channels
Validity: Perpetuity
Connectors
XLR Powerline: (2) 3-pin XLR-M/F
Gooseneck Mic: 3-pin Tuchel
Headset: 4-pin XLR–M
Program Audio: 3-pin XLR–F
Stage Announce: 3-pin XLR–M
Hot Mic/IFB Interface: 1/4\" (6.35 mm) TRS Jack
GPIO: 25-pin D-type female (4 GPI, 4 GPO, 5V)
USB: Type A & Micro AB (factory service use)
Input Power Connector: IEC-C14
Microphone Pre-amplifier
Headset Mic Impedance: 200O (Dynamic)
Headset Mic Voltage: 1.7V (Electret selectable)
Limiter: +23dB
Route to 4-wire output at 0dBu: Mic Gain: 60dB (Dynamic), 45dB (Electret)
Frequency Response: 200Hz – 10 kHz ±3dB
Distortion: <0.2% THD @ 1kHz
Noise: <-55dBu (Dynamic), <-65dBu (Electret)
Headphone Amplifier
Load Impedance: >32O
Output Level: +12dBu before clipping
Sidetone: -12dB (selectable)
Route from a 4-wire input at 0dBu: Max Gain: 0dB
Frequency Response: 40Hz - 10kHz ±3dB
Distortion: <0.1% THD @ 1kHz
Noise: <-65dBu
Headphone Limiter: 0dB (selectable)
Loudspeaker Amplifier
Load Impedance: 8O
Output Level: +18dBu before clipping
Route from a 4-wire input at 0dBu: Max Gain: 18dB
Frequency Response: 200Hz - 10kHz ±3dB
Distortion: <0.1% THD @ 1kHz
Noise: <-50dBu
Program Audio Line Input
Maximum Level Before Clipping: +18dBu
Nominal Input Level: 0dBu (selectable)
Input Impedance: >= 10KO
Route to 4-wire output at 0dBu: Frequency Response: 20Hz - 10kHz ±3dB
Distortion: <0.2% THD @ 1kHz
Noise: <-65dBu
Stage Announce Output
Maximum Level Before Clipping: +18dBu
Nominal Output Level: 0dBu (selectable)
Output Impedance: <= 100O
Route from a dynamic headset: Frequency Response: 300Hz - 12kHz ±3dB
Distortion: <0.1% THD @ 1kHz
Noise: <-55dBu
Hot Mic Output
Maximum Level Before Clipping: +12dBu
Nominal Output Level: 0dBu (selectable)
Output Impedance: <= 100O
Route from a dynamic headset: Frequency Response: 300Hz - 12kHz ±3dB
Distortion: <0.2% THD @ 1kHz
Noise: <-55dBu
Powerline
Two independent network XLR Powerlines Frequency Modulated Ethernet - OFDM
Output Voltage: ±29.5V DC
Output Current (Max): 1.5A per Powerline
Frequency: 100kHz-25MHz Requires shielding integrity between Powerlines
Support up to 10 beltpacks each
Support up to 3-10 stations each
Use HelixNet Cable Calculator to validate load and cable distance.
Logic Power Output
To power Logic Inputs
Output Voltage: 5V, separate pin
Current (Max): 1mA
Logic Inputs -GPI
Assignable to talk, call, mic and headset keys
Input: 4
Style: Optically isolated
Detection Voltage (Min): 3V
Input Voltage (Max): 5V
Logic Outputs – GPO/Relay
Assignable to talk, call, SA keys and channel events
Outputs: 4
Style: Power Relay
Normalized: Open or Closed, separate pins
Switching Voltage (Max): 30V
Switching Current (Max): 2A
Power
Input Frequency Range: 100 - 240V AC
Input Frequency Range: 50 - 60Hz
Power (Max): 250W
Input Power Connector: IEC-C14
Practical Power Range: Power (Normal): 80-250W
BTU (Normal): 275-850BTU/hr Dependent on hosted modules and powerline connected beltpacks
Environmental
32º - +104ºF (0 - +40ºC) 90% relative humidity
Dimensions
1.75 x 19 x 13in (HxWxD)
(44 x 483 x 320mm)
Weight
5.83lbs (2.65kg)
Network Specifications (Firmware Version 4.2+)
Network Protocols
Ethernet IPv4–Unicast Audio and Control
mDNS–Multicast Device Discovery
Layer 3 routable with mDNS function limitations
HTTP–Management
TFTP-File Transport Protocol
NTP–Network Time Protocol
RTP–Audio Transport
WavPack–Audio Codec
Network Ports
Unicast:
Port 69 UDP–Firmware File Server
Port 80 TCP–Web Interface, System Management, Expansion
Port 123 UDP–Time Stamps for Service Logs
Port 655 TCP–Link Group Audio/Database
Port 6001 TCP–System Management
Port 6001 UDP–Audio Streams
Multicast:
Port 5353 UDP–mDNS, Names, Discovery, Linking, Expansion Optional for device names and linking
Mandatory for HMS/HRM Expansion
Network Parameters
Link Group Endpoint Support: 64 Endpoints are user stations, active Interface ports, Program Audio inputs and LQ accounts.
Bandwidth: 300 kbps each audio input linking between HMS/LQ Link Group audio sent dynamically between members 300-600 (max) kbps from each endpoint audio input to HMS 1200-2400 (max) kbps from HMS to each endpoint audio output
Network Jitter Tolerance: <= 128ms jitter buffer per audio stream receiver automatically adjusted to network performance
QoS Tags: DSCP=41, Assured Forwarding (AF)
Link-Local Default IP Address Range: 169.254.0.0/16
System Reserved IP Ranges: 10.0.0.0/8 for endpoints 172.23.0.0/16 for Link Group
Recommended Ethernet Switches
• Managed Ethernet Switch – Layer 3
• 100/1000 Base-T ports for endpoints
• 1000 Base IP Trunks between switches
• QoS Configuration
• Energy Efficient Ethernet bypass option
• IGMP Snooping bypass option
Please refer to the Clear-Com HelixNet Network Guide for additional switch settings and network characteristics